My boyfriend and I stayed at N'Dee's place for 5 days in late November - I was in town for a conference for work at BITEC and he had come along. We were looking primarily for accommodations that would allow me to get to/from the conference easily on the BTS metro line but that also were centrally located enough that he could explore Bangkok during the day while I was working. N'Dee's apartment checked both of those boxes.
The apartment is in a building off of Sukhumvit, a main road, and about a block from the Asoke BTS stop. If you're interested in street food (which we were) you couldn't ask for a better location. You'll find tons of street food vendors in almost any direction you walk from the apartment, within a block. There's also plenty of 7/11's and coffee shops within a block of the building.
The apartment itself met all of our expectations. The building itself was a little less modern than I had expected from the photos, but still very clean and welcoming. The apartment was clean and had everything we needed from an electric kettle to a washer to a great bathroom with consistent hot water.
The bed itself was a bit firm, but I found that to be the case in most of the places we stayed in Thailand over 2 weeks. Light sleepers should have no problem, the apartment was very quiet. The wifi was consistent for us while we were there. The AC worked very well, and we used the pool frequently (though it was a touch cold for me). There were plenty of clean towels as well.
Dee was extremely hospitable and communicative - any questions we sent were answered promptly. Check in / out was seamless.
We had a great stay and would highly recommend!